試驗製作한 凍結乾燥裝置의 特性과 人蔘抽出液의 乾燥에 對하여 = Performance Characteristics of Experimental Freeze-Drying Appratus and a Drying Example of Korean Ginseng Extracts

다국어 초록 (Multilingual Abstract)

To study the controlling factors which affect the drying rate during freeze-drying process, the authors have contructed an experimental freeze-drying apparatus as shown in Fig. 1. The characteristics of apratus as well as the exerimental results obtained from Korean ginseng extracts are summerized as follows;
1. The changes in sample weight, drying rate, temperature distribution in a sample, heater temperature and total pressure during the freeze-drying process of ginseng textracts was measured.
2. The weight measuring device had the sensitivity of 0.2g and an accuracy of 1/500 when the sample weight was 100g.
3. The required time for the freezing of ginseng extracts was about 40 minutes.
4. In the drying process of ginseng extracts (it’s concentration, 20%), the arrival time to established temperature was required about 7 hours, and the total time of the whole freeze-drying process of ginseng extracts was required about 45 hours.